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Are you magicka or stamina?
For leveling, just put all points in either stamina or magicka depending on what you are. If you're going stamina, I'd suggest you not use one handed and shield as the weapon you'll actually be using most of the time while leveling because it's rather lacking in damage in general and doesn't have any AOE.
Focus on damage until you get to the level where you'll start running group content (45 or so). Otherwise, leveling will take much longer. You can always respec back into a tank setup once you start doing group content.
Then if you're going for a classic Stamina DK build, I think you should put your points into stamina. You should be able to have a decent health pool just with set bonuses, enchants, and jewels traits. If you're going for a Magicka based build of course, go for magicka stats. By doing this, your character will have more versatility. You'll be able to change for a more DPS based build just by changing your gear (some dungeons requires that from a tank, and it's also good for non-dungeon content)